hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (Assigned) (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-2626) HA: BPOfferService.verifyAndSetNamespaceInfo needs to be synchronized
Date Sat, 03 Dec 2011 02:15:40 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon reassigned HDFS-2626:
---------------------------------

    Assignee: Todd Lipcon
    
> HA: BPOfferService.verifyAndSetNamespaceInfo needs to be synchronized
> ---------------------------------------------------------------------
>
>                 Key: HDFS-2626
>                 URL: https://issues.apache.org/jira/browse/HDFS-2626
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2626.txt
>
>
> When starting an HA blockpool with both namenodes up, I often see an NPE, referenced
by one of the TODOs. The issue is the following interleaving:
> - first BPActor registers, and sets bpNSInfo in BPOfferService. It then proceeds to initFsDataset
which takes a little bit of time
> - second BPActor registers, and sees bpNSInfo is non-null, then proceeds to heartbeat
loop. Meanwhile BPActor 1 is still initting FSDataset
> - second BPActor gets an NPE on first heartbeat since fsdataset is still null.
> We just need to synchronize that function to fix the NPE.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message